package com.wj.config.security.component;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Component;

import java.util.Collection;

/**
 * 权限控制
 * 判断用户角色
 *
 * @author wj
 * @since 1.0.0
 */
@Component
public class CustomUrlDecisionManager implements AccessDecisionManager {
    @Override
    public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {
        for (ConfigAttribute configAttribute : configAttributes) {
            String attribute = configAttribute.getAttribute();
            //判断是否是登录就可以访问
            if ("ROLE_LOGIN".equals(attribute)) {
                if (authentication instanceof AnonymousAuthenticationToken) {
                    throw new AccessDeniedException("尚未登录，请登录！");
                } else return;
            }
            //判断用户角色是否是url所需角色
            for (GrantedAuthority authority : authentication.getAuthorities()) {
                if (authority.getAuthority().equals(attribute)) {
                    return;
                }
            }
        }
        throw new AccessDeniedException("权限不足，请联系管理员！");
    }

    @Override
    public boolean supports(ConfigAttribute attribute) {
        return false;
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return false;
    }
}
